condition mean min max ZT0-3 0.6866733333333334 0.365695 1.3195700000000001 ZT4-7 0.0 0.0 0.0 ZT8-11 0.376996 0.376996 0.376996 ZT12-15 0.10417375 0.0 0.2083475 ZT16-19 0.3641275 0.3641275 0.3641275 ZT20-23 1.0118485000000002 1.0118485000000002 1.0118485000000002